Hi, every one. I have a simple question about the power measurement of a circuit which is powered by battery. Can I just disconnect the positive wire from the battery to circuit, and use a current meter to read the current while the circuit is operation?
And should I measure the DC current or AC current? If the AC current is measured, can I use the formula P=0.5*V*I to calculate the power?
Hi, every one. I have a simple question about the power measurement of a circuit which is powered by battery. Can I just disconnect the positive wire from the battery to circuit, and use a current meter to read the current while the circuit is operation?
And should I measure the DC current or AC current? If the AC current is measured, can I use the formula P=0.5*V*I to calculate the power?
I am working with battery powered circuits for GSM/UMTS sites. You sholud always use current clamp meter (DC range) in order to measure current while circuit is in operation. Other way is to put shunt in series and then measure voltage drop on it. AC component is usually small and is neglible but I do not know the current's values in your circuit. I am working with currents in order of 1-600 A DC.
Regards.
Hi, thanks for the replys. But I am wondering if the current is distorted and not sinusoidal any more, the average current will not the same as the DC current. I am wondering whether the current meter deal with the non-sinusoidal current? Is it just take the average current or anything else? Thanks